Pipe Universal Silicone Seal Ring Bathroom Kitchen Sewer One Way Check Valve 1. Unidirectional opening, automatic closure, smooth drainage 2. Plug and play, easy to install 3. 90 degrees left and right opening and closing, efficient drainage, no water return 4. Elastic interface, more widely used, firmly lock the water pipe, more sealed, strong odor prevention 5. With water purification hole, when using, directly insert the water purifier return pipe through the small hole 6. With anti-odor cover, cover the plug when not using the drain pipe, so that odor and bedbugs cant crawl into the room 7. Elastic, non-deformation, strong sealing 8. The jack can be cut to fit more sizes 9. Material: silicone 10. Suitable for downpipe inner diameter: 35-40mm45-50mm60-65mm70-75mm 11. Applicable drain pipe outer diameter: 18-32mm18-35mm18-45mm18-45mm 12. Size: 35-40mm about 8 x 5.4cm, 45-50mm about 6.5 x 7.5cm, 60-65mm about 7.7 x 9cm, 70-75mm about 9 x 9.5cm